Paper-making machine



Oct. 11, 1932. g LANGENBACHER 1,882,187

PAPER MAKING MACHINE Filed Sept. 8, 1931 3 SheetsSheet 1 J. LANGENBACHER PAPER MAKING MACHINE Filed Sept. 8, 1931 3 Sheets-Sheet 2 ||L.. r HWH U Oct. 11,1932;

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J. LANGENBACHER PAPER MAKING MACHINE s Shets-Sheet Filed Sept. 8, 1931 Oct 11, 1932.

Patented Oct. 11, 1932 PATENT OFFICE],

JA KOIB LAN'GENBACHER, OF REUTLINGEN, GERMANY PAPER-MAKIN G MACHINE Application filed'september 8, 1931, Serial No. 561,781, and in Germany March 14, 1931.

In paper-making machines it is necessary at each change of sieve to surface the wood covering of the suction boxes, so as to obtain a smooth running surface for the sieves. It

a has hitherto been the practice either to tool the suction boxes by hand or to surface them separately in special surfacing machines, true them up in the latter and return them to the aper-making machine. Both methods have een found to be not very satisfactory as they take a great deal of time.

It is desirable to keep the suction boxes which are united in groups in paper-making machines together when they are being sur-' faced, so that they can all be surfaced in one operation and need not be adjusted separate- 1y to the exact height.

Paper-making machines are known in which the whole of the sieve apparatus together with the associated suction boxes can be removed laterally when the sieves are changed. The present invention relates to a device which enables all the suction boxes which are removed together in this way to be surfaced at the same time in a single continuous operation. For this purpose the device is provided with a support or slide for the surfacing tool, which can be traversed cross-wise above the place where the suction boxes are removed and can thus travel over the whole of the surface of the suction box group in a continuous operation.

The device according. to the invention consists of a frame in which the surfacing tool both in the longitudinal direction of each separate suction box and in the'transverse direction over all the suction boxes of the group. The device according to the invention may be equally simply employed with existing paper-makin machines and can be fixed on the supportlng framework of the suction boxes.

In order to make-the frame as light as pos-- sible and not to load the cantilevers excessively, it can be made of tubes which, while very light-,have great stren h.

The device accordin to e invention also contains means for ma ing the surface of the suction boxes which is to be trued exactly with its driving motor can be caused to travel This can be effected either by the whole frame being made capable of being raised and lowered with respect to the cantilevers oronly the tool holder with respect to the frame.

In the accompanying drawings two constructional examples of the invention are shown.

Figs. 1 and 2 are a front and a side elevation of one constructional form of the device according to the invention.

Figs. 3, 4 and 5 are a front elevation, plan view and side elevation of a second constructional form of the invention.

Only the cantilevers 1 with a group of suction boxes S fixed on them are shown, as the other parts of the paper-making machine are of no importance.

The surfacing device according to the invention is fixed to the two cantilevers l of the paper-making machine b means of two brackets 2, on which are pillars 3. The pillars 3 support at their upper ends troughs 4 for supporting the longitudinal tubes 5..

The longitudinal tubes 5 which can be closed at either end by caps 5' support a brid e consisting of two transverse tubes 7,

whic receives the support for the cutter disk 8 and its driving motor 9.. As will be seen from Fig. 1 the transverse tubes 7 extend over the entire breadth of the suction boxes S, which are arranged next to one another in a row and are mounted on supports S. The motor '9 rests with rollers 10 on the transverse tubes 7 and can be guided alongthe latter by hand or by mechanical means. By this means the tool 8 comes successively 'over the separate suction boxes S.

The transverse tubes 7 rest with rollers 11 on the longitudinal tubes 5. For varying the depth of the cut removed by the cutter disk 8 from the suction boxes S the following arrangement is provided:

The rollers 11 are mounted in pairs at the ends of lever arms 12 mounted on the transverse tubes 7 so as to turn thereon. The lever arms 12 are provided with eyes 13 which receive a threaded spindle 14. The threaded spindles are turned by means of a hand wheel 15. The eyes 13 are rovided with opposite handed female threa so that by turning the hand wheel 15 the eyes 13 are axially displaced and the levers 12 thereby rocked about the transverse tubes 7. By this means the height of the transverse tubes 7 above the longitudinal tubes 5 and with it the distance of the disk 8 from the suction boxes S is Varied.

The cutter disk 8 is of conventional form and serves to remove fine veneers from the wood covering of the suction boxes in a manner. similar to a wood planing or spindle moulding machine.

The brackets 2 preferably always remain on the machine frame, the longitudinal tubes 5 with the pillars 3 fixed thereon are placed when required on the brackets, and the bridge with the tool holder and the motor is thereupon placed on the longitudinal tubes.

As will be seen the brid c with the tool carrier can be moved over t e entire length of the suction boxes S and thereupon the tool carrier along, the bridge across the entire breadth of the suction boxes S, so that the entire surface of all the suction boxes can be the suction boxes becomes either entirely flat or slightly arched, as is frequently required. The constructional form shown in Figs. 3 to 5, corresponds substantially to that shown in Figs. 1 and 2, similar parts have the same reference numerals. The difference consists solely in the means for the vertical adjustment of the tool carrier. In place of the horizontal threaded spindle 14 a vertical spindle 16 is provided, which can be moved upwards and downwards in asleeve17 having a female thread. At its lower end the spindle 16 has two pivots 18 which are connected to the levers 12 which are capable of turning on the transverse tubes .7. The threadedspindle 16 is moved upwards and downwards by means of the hand wheel 15, thereby rocking the levers 12 about the transverse tubes 7,

so that the distance of the latter from the longitudinal tubes 5 is altered.

It should be pointed out that the constructional details of the device are of no importance and that modifications can be adopted without departing from the spirit of the invention. It is essential, however, that means shall be provided for tooling a group of suction boxes over the whole extent of their total surface in one operation, as is the case with a tool slide which can be traversed cross-wise.

'What I claim is: l

. 1. A .device for surfacing suction boxes for 2. Adevice for surfacing suction boxes of paper-making machines in which the suction boxes belongmg to one set of sieves can be removed as a whole laterally, comprising in combination a frame consisting of two tubes extending parallel to the longitudinal direction of the suction boxes, a bridge capable of travelling on these tubes in the longitudinal direction of the suction boxes and also constructed of tubes, and a tool carrier and a motor for driving the same capable of being traversed on the said bridge in the transverse direction, as and for the purpose set forth.

3. A device as claimed in claim 2, and comprising reinforcing members for the tubes and between the reinforcing members and the tubes adjustable pressure screws for determining the curvature of the tubes, as and for the purpose set forth. i

4. A device as claimed in claim 1, and comprising screw gear for vertically adjusting the bridge supporting the tool carrier with respect to the longitudinal tubes, as and for the purpose set forth. I

In testimony whereof I have signed my name to this specification.

JAKOB LANGENBACHER. 

